Optical coherence tomography apparatus

An optical coherence tomography apparatus comprising:

• an optical coherence tomography optical system comprising:
• a measurement optical path,
• a reference optical path,
• an optical path length difference generator placed in at least one of the measurement optical path and the reference optical path and configured to generate at least two lights having an optical path length difference from each other, the generator comprising,
• a light splitter configured to split at least one of the measurement optical path and the reference optical path into a first optical path and a second optical path that is a detour optical path, and
• an optical combiner configured to combine the first optical path and the second optical path, and
• a detector configured to obtain a multiplexed spectral interference signal in which a first spectral interference signal and a second spectral interference signal based on the at least two lights generated by the optical path length difference generator are multiplexed, and
• an arithmetic controller configured to process the multiplexed spectral interference signal output from the detector to obtain depth information in which first depth information based on the first spectral interference signal and second depth information based on the second spectral interference signal are multiplexed separately from each other in a depth direction,
• the first depth information and the second depth information being depth information at a same depth position on an object to be examined and are obtained simultaneously.